Patents Assigned to Saft
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Publication number: 20230125633Abstract: The present application relates to an electrode comprising pillars of conductors covered with at least two layers for improving the deposition of lithium, and the electrochemical cells and batteries comprising same.Type: ApplicationFiled: March 30, 2021Publication date: April 27, 2023Applicant: SAFTInventors: Vincent PELE, Christian JORDY
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Publication number: 20230120151Abstract: The present invention relates to a current collector for a negative electrode, coated with at least one electronically conducting and ionically insulating layer, to the method for producing such a collector, and to batteries containing same.Type: ApplicationFiled: March 24, 2021Publication date: April 20, 2023Applicant: SAFTInventors: Vincent PELE, Christian JORDY, Nadège ROUMEGOUS
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Patent number: 11631866Abstract: Provided is pouch battery including an electrode assembly, and a case in which the electrode assembly is sealed and housed; the electrode assembly including a stacked structure of a sheet cathode, a sheet separator, and a sheet anode; the sheet cathode including a positive electrode active material disposed on a current collector; the sheet anode is thin conductive sheet on which lithium metal reversibly deposits on a surface thereof during discharging; the sheet anode being made of a conductive material other than lithium and having a surface substantially free from lithium metal prior to charging the battery. The pouch battery design is flexible and lightweight and provides high power density, making it a suitable replacement for conventional lithium-ion primary batteries and thermal batteries in many applications. Power can be further increased by the application of external compression. Additives and formation conditions can be tailored for forming a solid-electrolyte interface (SEI).Type: GrantFiled: June 8, 2020Date of Patent: April 18, 2023Assignee: SAFT AMERICAInventors: Thomas Greszler, Saori Tokuoka
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Publication number: 20230116369Abstract: The present application relates to novel mixed compounds based on oxides and sulfides, and the use thereof as a solid electrolyte, with improved sulfide stability. The application further relates to electrochemical elements and lithium batteries containing such electrolytes.Type: ApplicationFiled: March 23, 2021Publication date: April 13, 2023Applicants: SAFT, Centre national de la recherche scientifique, ECOLE NATIONALE SUPERIEURE D INGENIEURS DE CAEN, UNIVERSITE DE CAEN NORMANDIEInventors: Vincent PELE, Nadège ROUMEGOUS, Christian JORDY, Valérie PRALONG
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Patent number: 11621455Abstract: A vent assembly for a battery or a electrochemical cell may include a vent body configured to connect to a battery casing or a electrochemical cell body, a flame arrester and/or a pressure valve disposed in the vent body, a membrane disposed in the vent body between a vent opening of the battery or the electrochemical cell and the flame arrester and/or the pressure valve, and that is configured to shield the flame arrester and/or the pressure valve from electrolyte solution of the battery or the electrochemical cell, and a seal disposed between the vent body and the membrane. Also, a battery including a vent assembly.Type: GrantFiled: December 23, 2019Date of Patent: April 4, 2023Assignee: SAFT AMERICAInventor: Alain Emery
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Publication number: 20230032837Abstract: The invention relates to a method for determining the value of one or more parameters relating to the state of health of at least one accumulator of a battery that is intended to provide electrical energy to an external application. A first state-of-health parameter related to the resistance of at least one electrochemical element of the battery is determined according to the method comprising:—a step (1) of determining the value of the state of charge of the electrochemica 1 element, expressed as a percentage of a maximum state of charge; —a step (2) of verifying whether the determined value of the state of charge belongs to a sought range; —a step of repeating, as long as the result of the verification step (2) is not positive, the determination step (1) and then the verification step (2); —calculating the value of the first parameter as a function of at least the value of the state of charge determined during the last determination step (1).Type: ApplicationFiled: December 17, 2020Publication date: February 2, 2023Applicant: SAFTInventors: Sebastien LAURENT, Nathalie LEGRAND, Sebastien BENJAMN, Cedric GOUSSET
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Patent number: 11563212Abstract: A sacrificial positive active material for a lithium-ion electrochemical element which is a compound of formula (Li2O)x (MnO2)y(MnO)z(MOa)t in which: x+y+z+t=1; 1?x?y?0; 0.97?x?0.6; y?0.45; x ?0.17; y?0; y+z>0; t?0; 1?a<3. M is selected from the group consisting of Fe, Co, Ni, B, Al, Ti, Si, V, Mo, Zr and a mixture thereof.Type: GrantFiled: May 22, 2018Date of Patent: January 24, 2023Assignees: SAFT, ENSICAEN, UNICAEN, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Christian Jordy, Melanie Freire, Valerie Pralong
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Publication number: 20230016438Abstract: The present invention relates to a battery comprising: -i) at least two electrochemical elements (d) connected to one another by a connection part (c), each electrochemical element comprising a container, -ii) a material arranged between said at least two electrochemical elements, and -iii) at least one disconnection device, said device comprising: a heat-activatable element (a) able to deform when its temperature reaches a threshold value, the heat-activatable element being arranged such that, when its temperature QI reaches said threshold value, it disconnects the connection part (c) from at least one electrochemical element (d) through its deformation, said heat-activatable element not contributing to the conduction of electric current when an electric current flows through said electro-chemical elements, said heat-activatable element being placed in contact with the connection part (c) and with a current output terminal.Type: ApplicationFiled: November 30, 2020Publication date: January 19, 2023Applicant: SAFTInventors: Emmanuelle GARITTE, Phillippe BOREL, Dinh An NGUYEN, Mélanie DENDARY, Laure LE GUENNE
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Publication number: 20230010586Abstract: The invention deals with a sensor for sensing electrolyte creepage in a battery, a circuit comprising such sensor, and a battery connected to such circuit, with an application to an electrical circuit comprising the sensor and connecting a monitoring equipment to a to battery. The sensor element is adapted for being connected within an electrical circuit 1 connected to a battery 2, said battery comprising one or more electrochemical cells containing an electrolyte, wherein the sensor element comprises a electrical conductor element whose at least one electrical property varies when in contact with the electrolyte, such as to allow, when the sensor element is connected in a circuit, detection of an electrolyte creepage from a an electrochemical element of a battery 2 connected to the circuit 1 by measurement of the variation of the one electrical property of the conductor element.Type: ApplicationFiled: December 6, 2019Publication date: January 12, 2023Applicant: SAFT GROUPE SAInventors: Marcus KARLSTAD, Rune SJÖVALL, Robert ALEXANDERSSON, Roger FRANSSON, Alexander MOBERG, Miroslav ANDEL
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Publication number: 20230006257Abstract: Disclosed is an electrolyte composition comprising: a) a solvent comprising: i) either a mixture of 1,1,1,3,3,3-hexaflu-oro-2-methoxypropane (HFMP) or of 1,1,1,3,3,3-hexafluoro-2-(fluoromethoxy)propane (HFMFP), of monofluoroethylene carbonate (F1EC) and of 2,2,2-trifluoroethyl methyl carbonate (F3EMC), ii) or a mixture of 1,1,1,3,3,3-hexafluoro-2-methoxypropane (HFMP) or of 1,1,1,3,3,3-hexafluoro-2-(fluoromethoxy)propane (HFMFP), of monofluoroethylene carbonate (F1EC) and of 2,2,2-trifluoroethyl acetate (F3EA), b) at least one lithium salt, the cation of which is the cation of an alkali metal.Type: ApplicationFiled: August 21, 2020Publication date: January 5, 2023Applicant: SAFTInventors: Julien DEMEAUX, Marlène OSWALD
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Publication number: 20220407151Abstract: This invention concerns an electrochemical element, in particular a sulphurous solid electrolyte element, comprising a protective casing, as well as modules and batteries comprising such elements.Type: ApplicationFiled: November 27, 2020Publication date: December 22, 2022Applicant: SAFTInventors: Vincent PELE, Christian JORDY, Nadège ROUMEGOUS
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Publication number: 20220407106Abstract: A gel-type electrolyte comprising a matrix which is a poly(vinylidene fluoride-co-hexafluoropropylene) polymer in which is embedded a liquid mixture comprising at least one lithium salt and a solvent comprising at least one linear carbonate, the poly(vinylidene fluoride-co-hexafluoropropylene) polymer matrix representing 5 to 95% by weight in relation to the weight of the gel-type electrolyte and the liquid mixture representing 95 to 5% by weight in relation to the weight of the gel-type electrolyte. This electrolyte exhibits increased stability with respect to oxidation and reduction.Type: ApplicationFiled: October 15, 2020Publication date: December 22, 2022Applicant: SAFTInventors: Julien DEMEAUX, Marlène OSWALD, Apoline GILOT
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Publication number: 20220367842Abstract: Pre-lithiation methods using lithium vanadium fluorophosphate (e.g., LiVPO4F and its derivatives) (“LVPF”) as a cathode active material in a lithium-ion secondary battery. The pre-lithiation methods include compensating for an expected loss of active lithium by selecting LVPF having a specific pre-lithiated chemistry (or a blend of LVPF selected to have a specific pre-lithiated chemistry) and selecting a total amount of the pre-lithiated LVPF. The pre-lithiation methods may include initially charging the lithium-ion secondary battery at the lower of the two charge/discharge plateaus of LVPF to release active lithium.Type: ApplicationFiled: May 13, 2021Publication date: November 17, 2022Applicant: SAFT AMERICAInventors: Xilin CHEN, Frank CAO, Tyler RUFF, Jian DONG, Carine MARGEZ STEINWAY, Thomas GRESZLER, Kamen NECHEV
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Publication number: 20220336882Abstract: A method for avoiding the spread of a thermal event in an enclosure containing several modules (1, 2, 3, 4) of electrochemical elements, said method comprising the following steps: —detecting one or more critical modules (1, 2, 3) situated in the enclosure, and affected by a thermal event (13), a module being critical when one or more parameters associated with the status of the module have reached or crossed a predetermined threshold, —spraying a coolant (12) onto, or into, the critical module or modules (1, 2, 3) for a determined duration and/or at a determined flow rate, one or more modules (4) not detected as being critical modules not receiving any coolant (12).Type: ApplicationFiled: October 3, 2019Publication date: October 20, 2022Applicant: SAFTInventors: Gilles HELSCHGER, Christophe LE GUERN, Jean-Louis LISKA, Christophe MORIN
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Publication number: 20220320566Abstract: The invention concerns an electrochemical element and the method for manufacturing same, as well as a battery comprising one or more electrochemical elements, for application in particular in the field of electrochemical elements or Li-ion batteries. The electrochemical element comprises a closed shell (1) defining an internal volume inside which a bundle (2) is arranged, having alternating positive and negative electrodes (3) respectively connected to two positive and negative electrical output terminals and housing separators, the bundle (2) being impregnated with electrolyte. The shell (1) comprises a bottom wall (4) having an internal bottom face (4a), oriented towards the internal volume, and at least one side wall (5, 6) having an internal side face (5a, 6a), oriented towards the internal volume. The internal side face (5a, 6a) joins the internal bottom face (4a) by substantially forming an internal angle (a).Type: ApplicationFiled: July 10, 2020Publication date: October 6, 2022Applicant: SAFTInventor: Gerard RIGOBERT
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Publication number: 20220293934Abstract: A composite electrode with a solid electrolyte based on polycarbonates includes at least one solid electrolyte consisting of one or more (co)polymers obtained by ring-opening (co)polymerization (ROP) of at least one five- to eight-membered cyclic carbonate and, optionally, of at least one five- to eight-membered lactone, catalyzed with methanesulfonic acid or performed under microwave irradiation in the absence of catalyst. The hydroxyl functions at the end of the chain of the (co)polymer(s) may be protected. The electrode also includes at least one alkali metal or alkaline-earth metal salt and at least one electrode active material. The electrode may include one or more electrically conductive additives and/or one or more binders. The electrode may be used in an electrochemical system such as a lithium battery.Type: ApplicationFiled: March 9, 2022Publication date: September 15, 2022Applicants: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, SAFTInventors: Huu-Dat NGUYEN, Lionel PICARD
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Publication number: 20220285734Abstract: An electrolyte composition comprising: a) a solvent comprising: a mixture of at least two saturated cyclic carbonates, at least one of these saturated cyclic carbonates being fluorinated, at least one ether, said at least one saturated cyclic carbonate representing at most 1.5% by weight of the solvent, said at least one ether representing at least 40% by weight of the solvent; b) at least one lithium salt other than lithium difluorophosphate; c) lithium difluorophosphate in an amount representing from 0.1 to 1% by weight relative to the sum of weight of the solvent and weight of said at least one lithium salt. The use of this composition in an electrochemical cell comprising a lithium anode allows increased performance of the cell when it is discharged under a strong current at low temperature, and limited self-discharging when in operation at ambient temperature.Type: ApplicationFiled: July 9, 2020Publication date: September 8, 2022Applicant: SAFTInventors: Olivier HUCHET, Julien DEMEAUX, Michael CARRIQUIRY
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Publication number: 20220278309Abstract: An electrochemical cell of the lithium/sulfur type comprising: a) a cathode comprising: i) microporous carbon in the form of particles, the particle size distribution being characterized by a median volume diameter Dv50 of the particles which is greater than or equal to 1 ?m and less than or equal to 5 ?m; ii) sulfur having an oxidation degree in the range of 0 to ?2 in the pores of the microporous carbon; b) an electrolyte comprising a solvent, said solvent comprising at least one fluorinated carbonate; c) an anode composed of lithium metal or of a lithium metal alloy. The electrochemical cell exhibits an improved specific gravimetry and an improved life cycle.Type: ApplicationFiled: August 22, 2019Publication date: September 1, 2022Applicants: SAFT, KEMIJSKI INSTITUTInventors: Florent FISCHER, Thierry HEZEQUE, Laura Maria PARA, Cecilia Andrea CALDERON, Robert DOMINKO
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Patent number: 11360535Abstract: The present invention is notably directed to methods and systems for protecting a pre-charge circuit. The present invention is further directed to related computer-implemented program product. The method comprises monitoring the current flowing through the current limiting device, calculating the energy loading of the current limiting device over time, and managing the system state to prevent damaging operation of the pre-charge circuit.Type: GrantFiled: September 27, 2019Date of Patent: June 14, 2022Assignee: Saft America, Inc.Inventors: Ali Zenati, Christopher Thorpe, Theodore Brown
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Patent number: 11360144Abstract: The present invention is notably directed to methods for estimating a degradation of an electronically controlled electro-mechanical switch. The methods comprise determining a change of state of the contactor. They also comprise, computing, for each determined change of state, a wear increment WI of the contactor by: identifying a wear coefficient using a mapping between a last measured current through the contactor and a current range associated with a given wear coefficient; computing the actual wear WN of the contactor by adding the computed wear increment WI to a former known wear WI?1 of the contactor.Type: GrantFiled: September 27, 2019Date of Patent: June 14, 2022Assignee: Saft America, Inc.Inventors: Ali Zenati, Christopher Thorpe, Theodore Brown